Green’s Dictionary of Slang

1. to leave.

1967–8		Baker et al. CUSS 2123: Trip out Leave the campus.
1971		H.E. Roberts Third Ear n.p.: trip out v. to go or leave.

2. to fool, to trick, to dupe.

1980

E. Folb Runnin’ Down Some Lines 45: People that are easily duped or tripped out are seen with varying degrees of contempt or amusement.